Notice of Violation of IEEE Publication Principles "United Optimization of Transceivers Used in Multiuser MIMO Wireless System" by Z. Yu and W. Wu, in Proceedings of the 15th International Conference on Electronics, Communications and Computers, 2005, pp. 65-69 After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE's Publication Principles. This paper contains significant portions of original text from the paper cited below. The original text was copied without attribution (including appropriate references to the original author(s) and/or paper title) and without permission. Due to the nature of this violation, reasonable effort should be made to remove all past references to this paper, and future references should be made to the following article: "Transceiver Optimization for Multiuser MIMO Systems" by S. Serbetli and A. Yener, in IEEE Transactions on Signal Processing, vol. 52, no. 1, January 2004, pp. 214-216

We consider a multi-user wireless transmissions with multiple transmit antennas and multiple receive antennas. Every user multiplexes its symbols through its own linear precoder before being transmitted. In order to enhance the system performance by a system-level mean squared error rule, we propose algorithms to jointly optimize the linear precoders at each transmitter and linear decoders at each receiver. Simulation results show that our novel algorithm has a faster convergence speed.